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A New Method for Measuring the Equivalent Impedance of Filtering, Regulating and Rectifying Transformers

A technology of rectifying transformers and voltage regulating transformers, applied in measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc., can solve problems such as inability to measure, and achieve simple operation and reliable measurement results

Active Publication Date: 2019-03-08
GUANGXI LIUZHOU SPECIAL TRANSFORMER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] In the above two voltage regulation methods, the high-voltage windings of the rectifier transformer are connected in series with the high-voltage windings of the voltage-regulating transformer. Conventional method to measure impedance, the measured U gb and U gb The impedance includes the impedance component of the voltage regulating transformer, which is different from the actual value, so the equivalent impedance cannot be measured by conventional methods, that is, the impedance value U gb and U gb can't detect at all

Method used

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  • A New Method for Measuring the Equivalent Impedance of Filtering, Regulating and Rectifying Transformers
  • A New Method for Measuring the Equivalent Impedance of Filtering, Regulating and Rectifying Transformers
  • A New Method for Measuring the Equivalent Impedance of Filtering, Regulating and Rectifying Transformers

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Embodiment 1

[0070] A new method for measuring the equivalent impedance of a filter voltage regulating and rectifying transformer, the method is a new filtering voltage regulating method which adopts the positive and negative switching voltage regulating mode or the coarse and fine regulating switching voltage regulating mode for the integrated structure of the voltage regulating transformer 101 and the rectifier transformer 102 The method for measuring the equivalent impedance of a rectifier transformer includes the following steps:

[0071] S1: Measure the impedance value U of the induction filter winding and the low-voltage winding of the rectifier transformer bd :

[0072] Short-circuit and ground the head of the low-voltage winding L3 of the rectifier transformer, input voltage and current on the L2 side of the induction filter winding, and measure the impedance value U of the induction filter winding and the low-voltage winding of the rectifier transformer. bd ;

[0073] S2: By cha...

Embodiment 2

[0082] A method for measuring the equivalent impedance of a novel filter voltage regulating rectifier transformer. Measurement method, in this forward and reverse switching voltage regulation mode, the outlets A2, B2, and C2 of the high-voltage winding L1 of the rectifier transformer are directly connected to the incoming wires A1, B1, and C1 of the voltage-regulating transformer, and the other end of the high-voltage winding of the rectifier transformer is directly connected to Y2. , Each phase of Z2 and X2 is divided into 2 heads, which are respectively connected to the K0 gear of the pressure regulating switch K2 and the movable switching gear contact of the reversing switch K1, and are connected to the dynamic switching contact gear of the pressure regulating switch K2 of the neutral point of the voltage regulating transformer. The position is in the rated range N, and the measurement method includes the following steps:

[0083] S1: Measure the impedance value U of the in...

Embodiment 3

[0093] A method for measuring the equivalent impedance of a novel filter voltage regulating rectifier transformer, the method is to measure the equivalent impedance of a new filter voltage regulating rectifier transformer which has an integrated structure of a voltage regulating transformer 101 and a rectifier transformer 102 and adopts a coarse and fine adjustment switch voltage regulation mode Method, in this coarse and fine adjustment switch voltage regulation mode, the heads A2, B2 and C2 of the high voltage winding L1 of the rectifier transformer are respectively connected with the moving shift contacts of the fine adjustment switch K4, and the other end of the high voltage winding of the rectifier transformer is connected to the heads Y2, Z2 and X2. Connect the neutral point of the voltage regulating transformer, and connect the incoming lines A1, B1 and C1 of the voltage regulating transformer to the positioning gear of the coarse adjustment switch K3. The measurement met...

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Abstract

Provided is a method of measuring the equivalent impedance of a novel filter, regulator and rectifier transformer. According to the method of measuring the equivalent impedance of a novel filter, regulator and rectifier transformer, a forward-reverse tuning switch regulation mode or a coarse-fine tuning switch regulation mode is adopted for a regulator transformer and rectifier transformer integrated structure. The method comprises the following steps: S1, measuring the impedance value Ubd of an inductive filtering coil and a rectifier transformer low-voltage coil; S2, by changing the connection of a forward-reverse tuning switch or a coarse-fine tuning switch, cutting off the serial connection between a rectifier transformer high-voltage coil and a regulator transformer high-voltage coil, and not passing the regulator transformer high-voltage coil; S3, measuring the impedance value Ugb of the inductive filtering coil and the rectifier transformer high-voltage coil; S4, measuring the impedance value Ugd of the rectifier transformer high-voltage coil and the rectifier transformer low-voltage coil; and S5, calculating the equivalent impedance |Uz|. By using the method, the impedance values Ugb and Ugd related to the rectifier transformer high-voltage coil can be measured, and the equivalent impedance can be measured. The method is simple to operate and reliable in measurement result, and does not affect normal operation of the transformer.

Description

technical field [0001] The invention relates to an impedance measurement method, in particular to a novel filter voltage regulation rectifier transformer equivalent impedance measurement method. Background technique [0002] The rectifier transformer side of the new energy-saving filter and voltage-regulating rectifier transformer adopts an induction filter scheme, which must ensure that the comprehensive equivalent impedance percentage of the induction filter winding is close to 0 (Note: │U z │≤0.1%); [0003] Equivalent impedance value formula: │U z │=│U bd + U gb – U gd │; where: [0004] U gd is the impedance value of the high voltage winding of the rectifier transformer and the low voltage winding of the rectifier transformer, [0005] U gb is the impedance value of the high voltage winding and the induction filter winding of the rectifier transformer, [0006] U bd It is the impedance value of the induction filter winding and the low voltage winding of the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/02
CPCG01R27/02
Inventor 陈磊王涛李武宁何祖文陈文哲贺慰宁
Owner GUANGXI LIUZHOU SPECIAL TRANSFORMER